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Exploring Microsoft Hyper-V Replica actions for VMs

There are plenty of different actions you can do with Microsoft Hyper-V Replica, but only a handful are available in both primary and replica VMs.

There are two types of virtual machines involved in the Hyper-V Replica configuration: primary and replica virtual...

machines. The replication of the virtual machine's contents take place from primary to a replica VM running on a Hyper-V Replica Server. There are a handful of actions available on the right click context menu of both primary and replica VMs. However, there are a few actions that are available only on just either the primary VM or the replica VM.

Test failover
Test failover is available on the replica VM. The test failover action, when executed, creates a test VM on the replica server to ensure VM can be brought online using the recovery points you select during the test failover. It can be executed any time without affecting the production workloads.

Planned failover
This action is available only on the primary VM. Planned failover is executed in case of any maintenance activities at the Hyper-V Primary Server or you need to intentionally failover to replica VM.

Failover
The failover action, which is available on the replica VM, is executed to bring the virtualized workloads at replica server in case of any disasters with the primary VM.

Remove replication
This action breaks the replication between primary and replica VMs. Remove replication can be executed from either of the VMs.

Reverse replication
Reverse replication action is available only on the replica VM. You will see reverse replication action on the right click context menu of the replica VM only if a planned failover was initiated from the primary VM or from an event that caused the failover from primary VM to replica VM. Once reverse replication action is executed, the replication direction changes from replica VM to primary VM.

Cancel failover
The cancel failover action is executed to cancel the current failover. If you think the replica VM is not working after applying the recovery point, the cancel failover helps you revert back the changes and start over with a new recovery point.

Remove replication points
Executing this action causes all recovery points to be removed from the replica VM. Execute remove replication points action only if you think recovery points will no longer be needed or you want to start a fresh replication cycle between primary and replica VMs. This action is executed on the replica VM.

Pause/resume replication
The pause/resume action is available on both the primary and replica VMs. As the name suggests, the pause action pauses the replication between primary and replica VMs. Generally, you pause the replication between primary and replica VMs in case of any maintenance activity at the Primary Hyper-V server.

View replication health
This action is available on both the VMs. Executing the view replication health action will show you the overall replication health of a particular virtual machine including replication delta to be replicated to replica VM, any missed replication cycles, last time the replication took place, etc.

It is important to understand that when the failover takes place, the replication direction changes which causes replica VM to act as primary VM and vice-versa. This would also change the actions on the right click context menu of both the VMs.

This was last published in November 2014

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